Pump



' 80 provide adevice of the t Patented Julyv 5, 1932 :rammen ennxnN, or wANns'nEx, camara PUMP Application ld Hay 5, 1930, Serial No. 449,913, and in Germany Hay 8, 1929.

My invention relates to improvements in pumps and an object of my invention is to provide a pump lwhich has a double acting cylinder 'whereby the pump can G larger quantity of liquid than is possi le with pump which employs a single acting cyliner.

A further object of my invention is to provide a device of the type described in which 10;the piston will pump liquid on its downstroke as Well as on its upstroke.

. A further object of my invention is to -provide a device of the type described in. which several. double acting cylinders are l5 arranged one below the other, thereby largely increasing the quantity ofliquid pumped, such quantity being double and treble that which can be pump'ed withdouble acting cylinders of other construction. 20 A furtherobject of my invention is to provide a device f the type described, inwhich the suction and pressure valves are concentrically arranged and in which the piston rod goes through several cylinders and valve 35 groups, this .piston rod carrying ordinary pump pistons without valves and being conlnected and secured withinthe body of the pistons.

A further object of my invention is to e described which is simple and compact 1n construction and which is adapted to b edis osed in a well which has a relatively small ore.

Other objects and advantages are that in consequence of thedouble acting of the cylinder. or cylinders the liquid Hows smoothly into the discharge line so that no air chamber is required, that the column of liquid to -be carried is lighter than usual in consequence of comparativelysnall diameter of working cylinder and piston, that the liquid enters into the cylinders from the outside through a numberof suction valve channels rings having large passages through which ump al thereby distributing the otftake, that valves. and space between working cylinder and out-j the liquid may flow, the guide-rings reventing any bue g of the pump rod w 'ch has todo work also on the downstroke, that no counterweights or other 'balancing devices are required, and that the rate of revolutions 5l per minutefcan' be made much higher than eretofore possible, thereby bringin the rev- -olution of the crankshaft of the wor ing` head inte more advantageous relation to the revolutions of modern driving machinery. The advantages'mentioned above have been tested and proven to exist by actual performance under all kinds of working conditions.

My invention is illustrated in the accompanying drawing forming part of this application, in which Fig. 1 is a vertical section through a valve caslng and through a-suction and pressurevalve, working cylinder, outer cylinder and r Wellcasing.

Fig. 2 is a cross section at w-b of Fig. 1.

(Note larger Apressure passages to allow easy flow ofliquid from cylinders arranged further down the well.)

Fig. 3 is a vertical section of one complete 75 double acting cylinder,

Fig. 4.shows the arrangement of several cylinders one below the other in thezwell casing.

working cylinder 1, one outer cylinder V2, two valve casings 11, two groups of valves, concentrically arranged.

One groupA of valves consists of: one pres-4 sure valve 8 with openings 8a and with con- 85 necting pipe 16 and guiding ring 15 with openings 15a, one suction valve 7 with openings 7 a, one spring 17 actuating both suction and pressure valve, two piston rod guiding pieces 13 with openings 13a, 'one connecting o piece 12, which at the same time acts as a guiding piece for the pisto'n rod, a single or the last of several cylinders having two such connecting pieces, one of them to connect with closed endpiece 10, one-piston rod 14, one pis- 95 ton 9 Without valve.

Each group of valves is guided by 15 and 8 inside of the valve casing. The pistonrod is Aguided above and below each group of valves. Each valve casing is provided with ribs 21 100 One double acting cylinder consists of: one 1 I on the outside to hold the cylinder eentrically in Well casing. The pump rod is `guided inside of the drop pipe by rings 2() having openings 20a, these rings being placed at the required distance from each other all the length of the drop pipe.

The working of the pump is shown in Fig. 3 and is as follows: On its down stroke the piston 9 creates a vacuum which tends to draw the liquid to be pumped through the upper suction valve openings 5 and the upper suction valve 7 into the working cylinder 1. Meanwhile the upper' pressure valve 8 is drawn on its seat, and rests there firmly, this action being assisted by pressure of spring 17 and by pressure of liquid when the pump has been working and liquidhas been pumped into drop pipe- On the return stroke, that is the upSti-oke, of the piston 9, a situation is created as shown in Fig. 3 for the lower group of valves, i. e.,the pressure of the liquid above the piston 9 tends to press the upper suction valve 7 firmly on its seat, opens the upper pressure. valve 8 and forces the liquid through openings 7 a and past pressure valve 8 into the space 3 between working and outer cylinder, where, in the case of several cylinders arranged one below the other, the stream of liquid is joined by the liquid coming from lower cylinders, partly flowing through openings 8a in pressure valve 8. In the case .of the upper end of one cylinder, or of the topmost of several cylinders, the li uid passes directly into the drop pipe 4. eanwhile the upper suction valve 7 remains rmly pressed on its seat, this action being assisted by pressure of spring 17.

The process is exactly reversed in the case of the lower group of valves. On its down stroke the piston 9 forces the liquid through lower pressure valve 8, whereas on its up stroke it draws the liquid through lower suction valve 7 intothe working cylinder.

It may bepointed out that the direction of movement of both suction and pressure valve corresponds with the direction of movement of the piston rod, an obvious advantage. Further it may be pointed out that there is no connection through which pressure of liquid exerted on a pressure valve can be transmitted to any part of the suction valve in such a way as to tend to lift the suction valve ol its seat.

I claim:

1. A pump comprising a working cylinder, an outer cylinder, a piston and two valve casings, each valve casing containing several suction channels leading the liquid from the outside to the suction valve seat, a suction valve arranged concentrically around a pressure valve and guided by-such pressure valve, which suction valve allows the liquid to iow past both sides of its seat when the liquid is being drawn into the cylinder and has openings through which the liquid flows to the pressure valve when the liquid is being pressed bythe piston, a pressurev valve through which passes the -plston rod and which pressure valve is equipped with two guiding pieces above and below its seat, the guiding pieces having openlngs through which the liquid flows, several pressure channels which arcconnectcd with the space between working cylinder and outer cylinder, such space forming, within the valve casing, the connection between suction and pressure channels, and a spring which actuates' both 4 suction and pressure valve.

2. A pump including two or more uniform double acting deep well cylinder aggregates as defined in claim 1,- with the addition of sleeve nipples connecting the respective valve casings, single piston rods gulded by said nipples, said piston rods being secured in the piston bodies of each single working piston and ext-.ending through all working cylinders and through all groups of valves, whereby to assist in the movement of the valves on opening and closing in the same'direction as the valves are moving. 4

In testimony whereof I aflix my signature.

HEINRICH GERKEN. 

